[a-folov]

Gains that come quickly can leave quickly; losses that come quickly can be reversed at the same speed. Two weeks may seem like a lot, but the peace of mind and determination that it will provide for you, as well as the anticipation and anxiety to get back to your routine will make it all worth-while.

Of course, it doesn't have to be two weeks exactly - but that seems to be the opimal time for many people.